I've seen a few of these pictures now, and I have zero clue how one would do
this....

The one on the bottom


all of these hahahaha

i have been wondering about this too. i have no clue. mt best guess is that they put a mound of icing on top then use a spatula to scrape out the swirl?

Check out this thread.

http://cakecentral.com/cake-decorating-ftopict-722757.html

Thanks Jilly!!!